Display screen or portion thereof with a gaming machine interface



The FIGURE is a front view of a display screen or portion thereof with a gaming machine interface showing our new design.

The rectangular broken-line perimeter illustrates a display screen or portion thereof and forms no part of the claimed design. The remaining broken lines represent elements of the gaming machine interface that form no part of the claimed design. Applicant reserves the right to claim any part, portion, element and/or combination thereof of the disclosed design(s), including to replace any solid line with a broken line to disclaim any part, portion, element and/or combination thereof of the disclosed design(s), or to replace any broken line with a solid line to claim any part, portion, element and/or combination thereof of the disclosed design(s). 

CLAIM We claim the ornamental design for a display screen or portion thereof with a gaming machine interface, as shown and described. 